59results about How to "Adequate airtightness" patented technology

The invention discloses an extinguishment composition. The extinguishment composition comprises extinguishment powder and water, wherein the weight ratio of the extinguishment powder to the water ranges from 1:0.8 to 1:1.2. The extinguishment powder is composed of, by weight, 3 parts to 7 parts of calcium silicon residues, 1 part to 3 parts of fly ash, 1 part to 3 parts of flue gas desulfurization gypsum, and 0.5 part to 1.5 parts of cement. The invention further discloses an extinguishment method for spontaneous combustion of coal in a goaf. The method includes the first step of mixing and stirring the extinguishment powder with the water according to the weight ratio ranging from 1:0.8 to 1:1.2 to form extinguishment slurry, and the second step of injecting or spraying the extinguishment slurry manufactured in the first step into the goaf with the requirement for extinguishment so as to conduct grouting extinguishment. The invention further provides the purpose of using the extinguishment composition for conducting extinguishment for spontaneous combustion of the coal in the goaf. According to the method, less clay or loess is used, workloads for processing the extinguishment slurry are reduced, and acid gas produced by coal combustion can be solidified.

The invention discloses a PVC electrical tube. According to the main points of the technical scheme, the PVC electrical tube comprises a tube body, wherein a plurality of inner tubes for accommodating power lines or signal lines are arranged in the tube body; an elastic airbag for fixing the inner tubes on the inner wall of the tube body is also arranged in the tube body; the contact parts of the elastic airbag and the inner tubes all are isolating surfaces made of hard rubber; and metal nets for electromagnetic shielding are arranged on the outer wall of the tube body and in the isolating surfaces. The plurality of inner tubes with different functions can be effectively separated after the structure of the elastic airbag is inflated, so that the isolating surfaces wrap the overall PVC electrical tube and wrap the outer wall of the tube body in fit; the condition that individual signal isolation can be carried out on each inner tube is ensured; and signal interference among the inner tubes is avoided. By the structure of the elastic airbag, fixation of the inner tubes can be ensured while the inner tubes are isolated; and the inner tubes contradict the airbag, so that circuit power adjustment, signal shunting and the like are also facilitated after the inner tubes are used for a period of time.

The invention relates to the technical field of conveying devices, in particular to a mechanical arm rotating sucker conveying device. The mechanical arm rotating sucker conveying device comprises a mechanical arm main body, a sucker assembly, an air pipeline assembly and a first air pipe, wherein the sucker assembly comprises a fixed component fixedly connected with the mechanical arm main body, a rotating component which is connected with the mechanical arm main body and rotates relative to the fixed component and a plurality of suckers which are connected with the rotating component and synchronously rotate with the rotating component; the air pipeline assembly comprises a plurality of first air pipeline structures arranged on the fixed component and a plurality of second air pipeline structures arranged on the rotating component, and the second air pipeline structures separately communicate with the suckers and an air path formed by the first air pipeline structures; and the first air pipe is connected with the first air pipeline structures of the fixed component. The service life of the mechanical arm rotating sucker conveying device is longer, economical losses can be reduced, and the production efficiency is increased.

The invention discloses a sampling method for the original sample of large-scale fully weathered red bed sandstone, which comprises the following steps: manually excavating to the designed sampling depth at the selected intended sampling position; determining the set lithology and weathering type; expand the working face around the proposed sampling location; scrape the sandstone sample into a rock pillar with the inner diameter of the hard circular pipe used for sampling; put the half-separated hard circular pipe on the rock pillar, and use fine particles to fill the gap Fill it up, then fix it; cut off the bottom of the rock pillar, scrape the top and bottom of the rock pillar, and then fix the steel plate on the top and bottom of the rock pillar; wrap the hard circular tube and steel plate with dense gauze, Then fix it, apply liquid paraffin on the emery cloth; wrap it with plastic film, fix it and put it into the box, fill the space around it tightly with broken foam blocks to the top of the box, cover the top plate of the box; transport it to the laboratory. The sampling method of the invention has the advantages of simple operation, little disturbance, good impact resistance, low cost and easy transportation.

The invention discloses a cell refrigeration box for long-distance transportation, and belongs to the field of cell preservation devices. The cell refrigeration box for long-distance transportation comprises a refrigeration box main body, wherein a sealing door is hinged to the side wall of the refrigeration box main body; a C-shaped frame is clamped at one end, far away from the sealing door, of the refrigeration box main body; a storage hole is formed in the refrigeration box main body; a plurality of cell preservation boxes which are uniformly distributed are placed in the storage hole; a plurality of buffer rings matched with the cell preservation boxes are fixedly connected to the inner wall of the storage hole; the buffer rings are located between every two adjacent cell preservation boxes; the C-shaped frame comprises a fixing frame main body; mounting holes are formed in the upper end and the lower end of the fixing frame main body; and clamping plugs are clamped in the mounting holes. According to the cell refrigeration box, the cell preservation boxes can be clamped in a floating mode by a sealing mechanism in the transportation process, when the cell preservation boxes are subjected to strong impact, liquid nitrogen is released, so that after the buffer rings are broken, the released protective liquid covers a culture disc and is cooled and condensed by the liquid nitrogen, and long-time storage of cells is guaranteed.

The invention relates to a switching type descaling bubbler and a faucet. The switching type descaling bubbler comprises an aeration assembly, a fixed sleeve, a movable inner core and a descaling part, wherein the fixed sleeve is provided with a plurality of water inlets; the movable inner core is provided with a first water outlet passage and a second water outlet passage, is sheathed on a fixed base, and is operated to rotationally engage the water inlet and the first water outlet passage or the second water outlet passage; the bubbler assembly is arranged in the first water outlet passage; the descaling part is arranged in the second water outlet passage, and is provided with a plurality of ejector pins; a pushing structure is arranged between the descaling part and the fixed sleeve, so as to push the ejector pins to move between the water outlets of the second water outlet passage in an inserting or disengaging way. The switching type descaling aerator has the advantages that the operation is simple, the water drain modes are diversified, the blocking possibility of the bubbler is reduced, and the service life is prolonged.

The invention relates to a waste water hoisting facility, which comprises a container (2) and at least one pump unit (6) equipped inside the container. The pump unit (6) comprises a discharge sleeve pipe (13) connected with a discharge pipeline (8). The pump unit is removably inserted through an opening in a wall of the container. The discharge sleeve pipe (13) is connected with the discharge pipeline (8) through couplers (14, 16) detechable along the insertion direction (X) of the pump unit (6).

The invention provides a protection system and a method of a mechanical gearbox synchronizer. A gear locking mechanism is additionally arranged on a gearbox shifting device; when a clutch is not thoroughly separated or the clutch is not separated, the gearbox shifting device is locked by the gear locking mechanism, and gear shift cannot be implemented; and after the clutch is separated, the gear locking mechanism is unlocked, and at the moment, a driver can shift, so that the synchronizer is prevented from being damaged by gear shift when the clutch is not separated. According to the protection system and the method, the gear shift habit of the driver can be specified, the driver cannot shift in the condition that the clutch is not trodden, and the synchronizer is prevented from being damaged in advance due to violation operation; the off-shift hidden danger of a gearbox can be avoided when driving on special roads such as big bump and the like, so that the driving safety is greatly increased. According to the protection system and the method, the service life of the synchronizer can be prolonged, so that the service life of the gearbox is prolonged.

The invention discloses a wall-climbing robot based on a roller type suction cup. The wall-climbing robot comprises a shell, a wheat wheel assembly, a roller type suction cup assembly and a restraining assembly, the wheat wheel assembly is fixedly arranged at the bottom of the shell, and the roller type suction cup assembly and the restraining assembly are both arranged on the shell; the restraining assembly is arranged corresponding to the roller type suction cup assembly. The robot has extremely high wall surface adaptability and obstacle crossing ability, meanwhile, modular design is adopted, the boundaries of all the assemblies are clear, and assembly, maintenance and overhaul are easy.

A method for producing a spindle drive for an adjustable element of a vehicle, wherein the spindle drive has a substantially tubular spindle drive housing and two connections for diverting driving movements, wherein at least one connection of the spindle drive has a connection head which is connected to the spindle drive via a connection neck which is thinner than the connection head. A sealing cap for the spindle drive housing is provided with a sealing opening, in order to install the sealing cap, the sealing cap is pulled with the sealing opening thereof over the connection head of a connection of the spindle drive, and the peripheral region of the sealing opening is elastically deformed by the engagement with the connection head and is therefore widened, and that the peripheral region of the sealing opening is subsequently deformed back elastically in frictionally sealing engagement with the connection neck.

The invention discloses a two-position three-way valve and an air blowing assembly, and relates to the technical field of valve bodies. The two-position three-way valve comprises a valve body, a moving assembly movably arranged in the valve body and a sealing structure, the side wall of the valve body is provided with two low-pressure air inlet holes, a high-pressure air inlet hole, a high-pressure air outlet hole and a high-pressure exhaust hole, in the first direction of a first shaft, the two low-pressure air inlet holes are formed in the upstream and the downstream of the moving assembly correspondingly, and air enters the two low-pressure air inlet holes to push the moving assembly to move in different directions; the sealing structure comprises a first abutting part, a second abutting part, a third abutting part and a fourth abutting part which are of circular truncated cone structures and take the first shaft as a central shaft, wherein the third abutting part is arranged on themoving assembly and used for being matched with the first abutting part, the fourth abutting part is used for being matched with the second abutting part, and the distance between the third abuttingpart and the fourth abutting part is smaller than the distance between the first abutting part and the second abutting part. Due to the arrangement, the sealing effect is good, circulating media cannot be corroded, and the service life of the valve body cannot be affected.

The invention discloses a soft-back microneedle and a manufacturing method thereof, and belongs to the technical field of medical equipment. The soft-back microneedle comprises a base plate and needle-shaped objects fixed at the bottom of the base plate, the base plate and the needle-shaped objects are integrally cast and formed together, the base plate and the needle-shaped objects are made of thermoplastic materials, the base plate is a bendable soft flexible plate, and each needle-shaped object is of a big-top small-bottom structure. The soft-back microneedle is made of a thermoplastic material, and the thermoplastic material has the following advantages that 1, the thermoplastic material is safe and does not cause skin allergy; 2, after the microneedle made of the thermoplastic material is inserted into skin to make contact with body fluid, the skin feeling is better; and 3, the thermoplastic material is insoluble or slightly soluble in water or can still keep enough adhesiveness after meeting water, and can be conveniently pulled out after drug delivery is finished instead of being dissolved in the skin. Moreover, the thermoplastic material can be made into a deformable flexible material, the manufactured base plate is the bendable soft flexible plate, and then an auxiliary layer which is also soft is adhered to the base plate, so that the microneedle can meet the use requirements of a large number of large-area and large-curvature human body parts.

The invention relates to a valve upper structure, comprising a head piece, a spindle centrally penetrating the head piece and a valve body actuatable via the spindle for attachment at a valve seat of a housing, wherein at the valve body, on its side directed away from the spindle, a sealing device is arranged. The sealing device comprises a substantially cylindrically designed valve plug which, concentric to the spindle axis, is provided with a groove which accommodates a sealing disc which projects beyond the height of the groove.